package behavior.State;

/**
 * A state interface �û������Ϲ����״̬�仯: ѡ����Ʒ --> ��ɶ��� --> ����ȡ��
 */
public interface IShopState {
	public void shop();

	public void generateBill();

	public void pay();
	// protected void changeState(ShopContext c, IShopState);
}